we have a 'Habitat for Humanity ReStores' in the Buffalo area that takes in just about everything & you can get amazing deals on cabinets that have been removed.

You can’t just buy and expect them to work - you have to dedicate yourself or another human to really loving the properties and the neighborhoods.

The investor in me tells me that they should go pound sand.The human in me says try to work with them.

I would call around the country to dealers and tell them you want it drop shipped .

I have done several Habitat for Humanity builds there and handing out T giving food and it’s not an area I would want to have investments.  

Just playing devil's advocate and I'm a fan of living as close to work as humanly possible so you can bike/ walk. 

Similar to how you can only sell X number of cars per year without being a dealer.  

Empathy and compassion make space for a clear, intuitive approach to identifying neighborhoods – where human people live – that are ripe for flipping fair.

If they refuse, evict them and get them out.You may also considering screening all your current occupants to clean out any drug dealers, sex offenders, etc.

You can always add a provision in your lease for your tenants to provide that consent by signing the agreement, but not for their associates showing up on the premises.Based on your description, I myself could be thrown in jail instead of the drug dealers I am recording that are conducting illicit activities inside the vestibule of my own building.